OPA548中文资料

®1OPA548OPA548VIN–VIN+V+E/SRCLRCLsetsthecurrentlimitvaluefrom0to5A.(1/4WResistor)ILIMVOV–InternationalAirportIndustrialPark•MailingAddress:POBox11400,Tucson,AZ85734•StreetAddress:6730S.TucsonBlvd.,Tucson,AZ85706•Tel:[phone]•Twx:910-952-1111Internet:•FAXLine:[phone](US/CanadaOnly)•Cable:BBRCORP•Telex:066-6491•FAX:[phone]•ImmediateProductInfo:[phone]®OPA548High-Voltage,High-CurrentOPERATIONALAMPLIFIERDESCRIPTIONTheOPA548isalowcost,high-voltage/high-currentoperationalamplifieridealfordrivingawidevarietyofloads.Alaser-trimmedmonolithicintegratedcir-cuitprovidesexcellentlow-levelsignalaccuracyandhighoutputvoltageandcurrent.TheOPA548operatesfromeithersingleordualsup-pliesfordesignflexibility.Insinglesupplyoperation,theinputcommon-moderangeextendsbelowground.TheOPA548isinternallyprotectedagainstover-temperatureconditionsandcurrentoverloads.Inaddi-tion,theOPA548wasdesignedtoprovideanaccurate,user-selectedcurrentlimit.Unlikeotherdesignswhichusea“power”resistorinserieswiththeoutputcurrentpath,theOPA548sensestheloadindirectly.Thisallowsthecurrentlimittobeadjustedfrom0to5Awitharesistor/potentiometerorcontrolleddigitallywithavoltage-outorcurrent-outDAC.TheEnable/Status(E/S)pinprovidestwofunctions.Aninputonthepinnotonlydisablestheoutputstagetoeffectivelydisconnecttheloadbutalsoreducesthequiescentcurrenttoconservepower.TheE/SpinoutputcanbemonitoredtodetermineiftheOPA548isinthermalshutdown.TheOPA548isavailableinanindustry-standard7-leadstaggeredTO-220packageanda7-leadDDPAKsurface-mountplasticpowerpackage.Thecoppertaballowseasymountingtoaheatsinkorcircuitboardforexcellentthermalperformance.Itisspecifiedforoperationovertheextendedindustrialtemperaturerange,–40°Cto+85°C.ASPICEmacromodelisavailablefordesignanalysis.FEATURESlWIDESUPPLYRANGESingleSupply:+8Vto+60VDualSupply:±4Vto±30VlHIGHOUTPUTCURRENT:3AContinuous5APeaklWIDEOUTPUTVOLTAGESWINGlFULLYPROTECTED:ThermalShutdownAdjustableCurrentLimitlOUTPUTDISABLECONTROLlTHERMALSHUTDOWNINDICATORlHIGHSLEWRATE:10V/μslLOWQUIESCENTCURRENTlPACKAGES:7-LeadTO-2207-LeadDDPAKSurface-MountOPA548OPA548©1997Burr-BrownCorporationPDS-1389BPrintedinU.S.A.October,1997APPLICATIONSlVALVE,ACTUATORDRIVERlSYNCHRO,SERVODRIVERlPOWERSUPPLIESlTESTEQUIPMENTlTRANSDUCEREXCITATIONlAUDIOAMPLIFIER®2OPA548SPECIFICATIONSAtTCASE=+25°C,VS=±30VandE/Spinopen,unlessotherwisenoted.OPA548T,FPARAMETERCONDITIONMINTYPMAXUNITSOFFSETVOLTAGEInputOffsetVoltageVCM=0,IO=0±2±10mVvsTemperatureTA=–40°Cto+85°C±30μV/°CvsPowerSupplyVS=±4Vto±30V30100μV/VINPUTBIASCURRENT(1)InputBiasCurrent(2)VCM=0V–100–500nAvsTemperatureTA=–40°Cto+85°C±0.5nA/°CInputOffsetCurrentVCM=0V±5±50nANOISEInputVoltageNoiseDensity,f=1kHz90nV/√HzCurrentNoiseDensity,f=1kHz200fA/√HzINPUTVOLTAGERANGECommon-ModeVoltageRange:PositiveLinearOperation(V+)–3(V+)–2.3VNegativeLinearOperation(V–)–0.1(V–)–0.2VCommon-ModeRejectionVCM=(V–)–0.1Vto(V+)–3V8095dBINPUTIMPEDANCEDifferential107||6Ω||pFCommon-Mode109||4Ω||pFOPEN-LOOPGAINOpen-LoopVoltageGainVO=±25V,RL=1kΩ9098dBVO=±25V,RL=8Ω90dBFREQUENCYRESPONSEGain-BandwidthProductRL=8Ω1MHzSlewRateG=1,50Vp-p,RL=8Ω10V/μsFullPowerBandwidthSeeTypicalCurvekHzSettlingTime:±0.1%G=–10,50VStep15μsTotalHarmonicDistortion+Noise,f=1kHzRL=8Ω,G=+3,Power=10W0.02(3)%OUTPUTVoltageOutput,PositiveIO=3A(V+)–4.1(V+)–3.7VNegativeIO=–3A(V–)+3.7(V–)+3.3VPositiveIO=0.6A(V+)–2.4(V+)–2.1VNegativeIO=–0.6A(V–)+1.3(V–)+1.0VMaximumContinuousCurrentOutput:dc±3Aac3ArmsLeakageCurrent,OutputDisabled,dcSeeTypicalCurveOutputCurrentLimitCurrentLimitRange0to±5ACurrentLimitEquationILIM=(15000)(4.75)/(13750Ω+RCL)ACurrentLimitTolerance(1)RCL=14.8kΩ(ILIM=±2.5A),±100±250mARL=8ΩCapacitiveLoadDriveSeeTypicalCurve(4)OUTPUTENABLE/STATUS(E/S)PINShutdownInputModeVE/SHigh(outputenabled)E/SPinOpenorForcedHigh(V–)+2.4VVE/SLow(outputdisabled)E/SPinForcedLow(V–)+0.8VIE/SHigh(outputenabled)E/SPinHigh–65μAIE/SLow(outputdisabled)E/SPinLow–70μAOutputDisableTime1μsOutputEnableTime3μsThermalShutdownStatusOutputNormalOperationSourcing20μA(V–)+2.4(V–)+3.5VThermallyShutdownSinking5μA,TJ160°C(V–)+0.35(V–)+0.8VJunctionTemperature,Shutdown+160°CResetfromShutdown+140°CPOWERSUPPLYSpecifiedVoltage±30VOperatingVoltageRange±4±30VQuiescentCurrentILIMConnectedtoV–,IO=0±17±20mAQuiescentCurrent,ShutdownModeILIMConnectedtoV–,IO=0±6mATEMPERATURERANGESpecifiedRange–40+85°COperatingRange–40+125°CStorageRange–55+125°CThermalResistance,θJC7-LeadDDPAK,7-LeadTO-220f50Hz2°C/W7-LeadDDPAK,7-LeadTO-220dc2.5°C/WThermalResistance,θJA7-LeadDDPAK,7-LeadTO-220NoHeatSink65°C/WNOTES:(1)High-speedtestatTJ=+25°C.(2)Positiveconventionalcurrentflowsintotheinputterminals.(3)See“TotalHarmonicDistortion+NoisevsFrequency”intheTypicalPerformanceCurvessectionforadditionalpowerlevels.(4)See“Small-SignalOvershootvsLoadCapacitance”intheTypicalPerformanceCurvessection.®3OPA548ABSOLUTEMAXIMUMRATINGS(1)OutputCurrent.................................................................SeeSOACurveSupplyVoltage,V+toV–.....................................................